BE763473A - Procede pour diminuer la teneur en fluor du sulfate de calcium dihydrate de rebut precipite au cours de la production de l'acide phosphorique - Google Patents
Procede pour diminuer la teneur en fluor du sulfate de calcium dihydrate de rebut precipite au cours de la production de l'acide phosphoriqueInfo
- Publication number
- BE763473A BE763473A BE763473A BE763473A BE763473A BE 763473 A BE763473 A BE 763473A BE 763473 A BE763473 A BE 763473A BE 763473 A BE763473 A BE 763473A BE 763473 A BE763473 A BE 763473A
- Authority
- BE
- Belgium
- Prior art keywords
- decreasing
- production
- phosphoric acid
- fluorine content
- calcium sulphate
- Prior art date
Links
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 title 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 title 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 title 1
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 title 1
- 230000003247 decreasing effect Effects 0.000 title 1
- 229910052731 fluorine Inorganic materials 0.000 title 1
- 239000011737 fluorine Substances 0.000 title 1
- 239000002699 waste material Substances 0.000 title 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
- C01F11/468—Purification of calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/08—Compounds containing halogen
- C01B33/10—Compounds containing silicon, fluorine, and other elements
- C01B33/103—Fluosilicic acid; Salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B11/00—Calcium sulfate cements
- C04B11/02—Methods and apparatus for dehydrating gypsum
- C04B11/024—Ingredients added before, or during, the calcining process, e.g. calcination modifiers
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B11/00—Calcium sulfate cements
- C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT170170A AT297041B (de) | 1970-02-25 | 1970-02-25 | Verfahren zur Verminderung des Fluorgehaltes von Phosphorsäureabfallgips |
| DE19702009647 DE2009647A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1970-02-25 | 1970-03-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE763473A true BE763473A (fr) | 1971-08-25 |
Family
ID=25596588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE763473A BE763473A (fr) | 1970-02-25 | 1971-02-25 | Procede pour diminuer la teneur en fluor du sulfate de calcium dihydrate de rebut precipite au cours de la production de l'acide phosphorique |
Country Status (7)
-
1970
- 1970-02-25 AT AT170170A patent/AT297041B/de not_active IP Right Cessation
- 1970-03-02 DE DE19702009647 patent/DE2009647A1/de not_active Withdrawn
- 1970-12-21 NL NL7018582A patent/NL7018582A/xx unknown
-
1971
- 1971-01-18 ZA ZA710309A patent/ZA71309B/xx unknown
- 1971-02-18 BR BR1106/71A patent/BR7101106D0/pt unknown
- 1971-02-25 BE BE763473A patent/BE763473A/xx unknown
- 1971-04-19 GB GB2123771A patent/GB1346933A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2009647A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1971-12-02 |
| ZA71309B (en) | 1972-08-30 |
| GB1346933A (en) | 1974-02-13 |
| AT297041B (de) | 1972-03-10 |
| NL7018582A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1971-08-27 |
| BR7101106D0 (pt) | 1973-06-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RO63489A (fr) | Procede pour la separation d'acide fluorhydrique | |
| RO62741A (fr) | Procede pour la preparation des esters d'acide phosphorique | |
| BE796739A (fr) | Procede de fabrication de sulfate de calcium pur dans l'attaque humide a l'acide phosphorique | |
| OA02091A (fr) | Procédé pour la fabrication d'acide phosphorique et de sulfate de calcium hémihydrate par voie humide . | |
| RO63443A (fr) | Procede pour la preparation du dihydrate d'acide 7-(d-alpha-amino-1,4-cyclohexadien-1-ile-acetamido)-desacetoxycephalosporanique | |
| BE788615A (fr) | Procede de production d'acide sulfurique exempt de mercure | |
| BE856404A (fr) | Procede pour la production d'acide sulfurique a partir d'acides residuaires et de sulfate de fer | |
| BE825331A (fr) | Procede de production de fluorure de calcium a partir d'acide hexafluorosilicique | |
| RO70971A (ro) | Procedeu de producere a fainii brute pentru fabricarea cimentului si acidului sulfuric | |
| BE745110A (fr) | Procede pour la production enzymatique de l'acide gluconique | |
| RO67820A (ro) | Procedeu pentru purificarea acidului fosforic | |
| BE756759A (fr) | Procede de fabrication d'acide phosphorique de voie humide et de sulfate de calcium de qualite amelioree | |
| BE763473A (fr) | Procede pour diminuer la teneur en fluor du sulfate de calcium dihydrate de rebut precipite au cours de la production de l'acide phosphorique | |
| BE789049A (fr) | Procede pour la preparation de l'acide citrique | |
| RO62007A (fr) | Procede pour la fabrication d'acide azotique concentre | |
| FR2316186A1 (fr) | Procede pour la preparation de l'acide sulfurique | |
| RO69916A (ro) | Procedeu pentru prepararea nitrilu.ui acidului 3,7-dimetiloct-2-en-1-oic | |
| BE756612A (fr) | Procede pour la fabrication d'anhydride sulfureux | |
| BE757141A (fr) | Procede de fermentation pour la production de l'acide citrique | |
| BE791400A (fr) | Procede de production d'acide sulfurique | |
| BE762365A (fr) | Procede pour la preparation d'acide amidoalcanes-sulfoniques | |
| BE828578A (fr) | Procede pour la preparation de sulfate de calcium stabilise susceptible de faire prise, par reaction de composes de calcium avec l'acide sulfurique | |
| RO66639A (ro) | Procedeu pentru prepararea acidului n5-metiltetrahdrohomofolic | |
| FR2291197A1 (fr) | Procede pour la purification d'acide cyanurique | |
| BE767712A (fr) | Procede pour la fabrication d'acide cyanacetique |